There are
2,036 mi
from Walnut Creek, CA to Kirkwood, MO
That's the driving distance. It would take 1 day 11 hours to go from Walnut Creek, California to Kirkwood, Missouri.
The flight distance (direct flight from Walnut Creek, CA to Kirkwood, MO) is 1,709.99 mi.
2,036 mi = 3,276.18 kms